If you no longer need an app or a game in Windows Phone 8, the process for removing it is not that intuitive, at least not at first. However, it is very quick and simple. You will need a guide on how to do it only the first time you want to try this. When removing an app or a game, it will get deleted together with all the information it stored on your smartphone. Here's how it works:
How to Remove an App From Your Windows Phone 8 Smartphone
First, locate the app you want to remove, in the Apps list.
Tap and hold the app until a contextual menu is shown, with several options. Tap uninstall.
Windows Phone 8 asks if you really want to uninstall the app. Tap yes if you still want to do it or no if you have changed your mind.
How to Remove a Game From Your Windows Phone 8 Smartphone
If you want to delete a game you installed, open the Games hub. You can do this by taping its tile on the Start screen or by taping its entry in the Apps list.
Then, tap and hold the game you want removed.
A contextual menu is displayed, with several options. Tap uninstall.
You are asked to confirm your choice.
Tap uninstall and the game is removed.
As you can see from this guide, uninstalling apps or games in Windows Phone 8 is easy but very different from other platforms like Android or iOS. Another difference is that, in Windows Phone, you can remove any app except those that are part of the operating system, like Internet Explorer. Therefore you can easily remove apps you don’t use but are bundled with your smartphone.